Head-stock for engine-lathes.



F'. B. COCKBURN. HEAD socx Foa Erasme LAHEs.

1,259,959. APPLICATION FILED APB. I8. 18|?. 'Patented Mar 19.

3 SHEETS-SHEET i.

F. B. COCKBUHN. HEAD STOCK FOR ENGINE LATHES.

APPIICATION FILED AFR. I6. 19|?. Patented Mar. 19

3 SHEETS-SHEET 2 F. B. COCKBUHN HEAD STOCK FOR ENGINE LATHES. APPLICATION man APB. le. 19H.

Patented Mar. 19, 191&

3 SHEETS-SHEET 3- 21m.; am@

a rtw/d W Whew UNITED STATES PATENT OFFICE.

FRANCIS B. COCKBURN. OF CINCINNATI, OHIO, ASSIGNOR TOITIIE LODGE 8c SHIPLEY MACHINE TOOL COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

HEAD-STOCK FOR ENGINE-LATHES.

Specification of Letters Patent.

Patented Mar. 19, 1918.

Application led April 16, 1917. Serial No. 162,475.

To alwlwm it may concern.'

Be it known that I, FRANCIS B. CoCKnUBN, a subject of the King of Great Britain, and residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Head- Stocks for Engine-Lathes, ot' which the following specilication is a full disclosure.

My invention relates to an improvement in a head-stock for engine lathes, particularly designed for the geared head type of spindle drive.

An object of the invention is to provide a head-stock structure having provisions for insuring eflicient spindle lubrication and which will internally confine the oil to prevent its leaking outwardly through the head-stock joints or outward-ly around the spindle bearings.

To this end the invention provides a twopart head-stock casing between which the spindle bearings are placed, the meeting surfaces of these casing members being formed with registering oil channels extending horizontally around the inclosed spindle and suitably graded to constitute an oil drain into the oil pit formed by the floor of the lower casing member. l

Also, the members forming the two end bearings for the spindle are formed with circumferential registering oil drains communicatinp` with the horizontal oil channel, and having drain ducts into the oil pit.4 These spindle bearing members are foimed to wipe the oil traveling outwardly longitudinally along the spindle and to drain this oil into the drain ducts leading to the oil pit.

I thus provide a communicating and graded oil channel system extending horizontally entirely around the spindle in the head-stock walls and reaching around the bearings within the head-stock, which forms a continuous lubricating stream from a given supply source, and which system' drains into a common oil pit or well and prevents the outward escape of oil around the head-stock spindle and spindle bearing 'oints v I This constitutes an entirely inclosed headstock structure with adequate lubrication provisions and yet entirely oil tight.

Figure 1 is a front end elevation, partly broken, to more clearly show the arrangement of the spindle bearing oil channel.

Fig. 2 is a rear end elevation similarly broken.

Fig. 3 is a vertical longitudinal section. on line tt-3, Fig. 1.

Fig. 4 is a bottom plan view of the upper casing member.

Fig. 5 is a top plan view of the lower casing member with the head-stock mechanism and the spindle bearing caps and sleeves removed.

Fi 6 is a detailed plan view of the front spint le bearing of the lower casing member showing the lower half of the spindle bear-- in sleeve.

Pig. 7 is a plan view of the front bearing cap.

The two-part head-stock casing illustrated in the drawings comprises a lower casing member 1 in which the head-.stock mechanism is supported and an upper casing member or cover 2 suitably secured thereto by bolts 3, two of which are shown in Fig. 2. 4, 5, represent alined main spindle bearing seats and each bearing comprises a two-part spindle bearing sleeve having lower and upper half members 6, 7, and a bearing 8 suitably secured to the lower casing ineinber to retain the spindle 30. These half sleeve members 6, 7 are secured to their re` spective seats and bearing caps by bolts 9, (see Fig. 2). The drive shaft 10 is couplet with the drive pulley 11 through an aperture 12 in the casing, the pulley being supported by a. housing 13 bolted to the rear end oii' the casing and provided with a gasket 14 inse.

ing an oil tight joint between said casing and housing.

The upper joint surface of the casing member 1 is formed with a horizontal eil channel 15 which extends downwardly at and follows the contour of the bearing seats 4, 5, converging into vertical drain ducts 16, 17 which through horizontal drainducts 18` 19, communicate with and drain into the oil pit or well 20. The bearing caps 8 are provided with peripheral oil grooves 21 which 'vertically a ine and communicate with the oil channel l5. The channel 15 is shallowest at 22, 23, from which points it is raded toward both spindle bearings to in ace a. pr'ciper flow o the returning oil.

he under joint surface of the up er casing member or cover 2 is contoure atthe spindle bearings to closely t over the bearing cap members 8 and is provided with an said notch drains into a vertical vlas 4 ing around the oil channel 25 which, when said member is secured to the lower casing member, registers with the oil channel 15 thereof to form an extended oil drain passage serving to arrest an oil which may commence to escape throug Y the casing joint and return it to t e it or well 20.

o prevent oil from flowing outwardly along the spindle past the casing, provision is made for wiping the oil from the spindle and entrainin it to the oil drain system.

As seen ingFig. 3, the two-paid'l spindle bearing sleeve is somewhat shorter than the bearing seats 4:, 5, and bearing caps 8, and that each lower half` 6 of said sleeve is notched as at-26 immediately above and adjacent an appro riate drain duct of the oil drain system. t the front bearin seat 4 uct 27, having an enlar ed upper end and which communicates with the horizontal duct 18. At the rear bearin seat said notch is directly alined with t e above mentioned vertical duct 17 which also has an enlarged upper end. These notches provide means for wiping the surplus oil from the spindle and entraming it into the oil drain system.

From the above it will be seen that the invention provides a two-part oil tight casing entirel inclosing a geared head-stock mechanism ubricated by a splash oil Slstem, and further that the invention provides a twopart casing having self-draining meeting ed s or joints.

aving described my invention I claim 1. A head-stock for a lathe comprising a two-part casing, spindle bearings and a spindle journaled therein, the casing comprising a lower and an upper casing member providing a horizontal casing joint extending around the spindle, the meeting surfaces of the Casin members having registering oil channels orming a raded oil drain passage extending around t e spindle bearings 'and terminatinr with oil ducts adjacent and below the spindle bearings and draining into the interior of the casing.

2. A headtock for a lathe comprisin a two- `art casing and a. spindle journa ed therein, the casing comprising a lower and an upper casing member providing a horizontal casing joint extending around the spindle, the lower casing member having alined bearing seats, bearing caps secured to said lower casing member and provided with peripheral oil grooves, twopart bearing sleeves comprising lower half members secured to said bearing seats and upper half members securedv to the bearing caps, the 'oint surface of the lower casing member ing provided with an oil channel extend- 'bearing seats to terminal drain ducts adjacent and below said seats andfdrainng into the interior of the casing, the joint surface of the upper casing oil member bein formed with an oil channel registering with the oil channel of the lower casing member 'and with the oil grooves of the bearing caps to form a raded oil drain passage for the easing auf bearing joints.

3. A headsstock for a lathe comprising a two-part casing and a spindle journalcd therein, the casmg comprising a lower and an upper casing member providing a horizontal easing joint extending around the spindle, the lower casing member having alined bearing seats, bcaringcaps secured to said lower casing member and provided with peripheral oil grooves, and two-part bearing sleeves comprising lower half members scculed to said bearing seats und upper half members secured to the bearing caps, the 'oint surface of the lower casing member eing provided with an oil channel extending around the bearing seats to terminal drain ducts adjacent and below sa'yl seatsf' and draining into the interior of the casing, the joint surface of the upper casing memberbein formed with an oil channel `registering with the oil channel of the lower casing member and with the oil grooves of the bearing caps to form a graded oil drain passage for the casing and bearin joints, the lower half member of the spinale bearing sleeves each having a. wiper notch in regista with a respective terminal oil drain duct o the lower casing member.

4. A head-stock for a lathe comprisin a vtwo-part casing and a spindle journa ed therein, the casing comprising a lower and an upper casing member providing a horizontal casing joint extending around the spindle, the lower casing member having alined bearing seats, bearing caps secured to said lower casing member and rovided with peripheral oil grooves, the joint surface of the lower casing member being provided with an 4oil channel extending around the bearing seats to terminal drain ducts adjacent and below said seats and draining into the interior of the casing, the 'oint surfaces of the upper casing member eing formed with an oil channel registering with the oil channel of the lower casing member and with the oil grooves of the bearing caps to form a graded oil drain passage for the casing and bearing joints.

5. A head-stock for a lathe comprising a two-part casing and a spindle journaed therein, the casing comprising a lower and an upper casing member providing a hori zontal easing joint extending around the spindle, the lower casing member havin alined bearing seats, bearing ca s secured to said lower casing member an provided with peripheral oil ves, the' joint surface of the lower easing member being provided with an oil channel extending around the bearing seats to terminal drain ducts into the interior of the casing, the joint sur face of the upper casin member bein formed with an oil charme? registering witg the oil channel of the lower casing member and with the oil rooves of the bearing caps to form a, grade oil drain passage for the casin and bearing joints, and stationary spindlie bearing sleeves having wiper notches in respectice registry with the terminal drain ducts of the lower casin member.

6. A head-stock for a athe comprising a. two-part casing as an inclosure for a splash lubricated head-stock mechanism including a spindle journaled between the casin members, the meeting joint surfaces of t e casing members and spindle bearings having registering oil channels to form an oil How passage having terminal oil draining ducts.

7. A splash lubricated head-stock for a lathe comprising heads-teck mechanism and bearings therefor, a. sectional casin inclosing said mechanism and bearings, t e meeting surfaces of said casin sections being formed to constitute an'oil ow conduit surrounding the head-stock mechanism to prevent external breakage, the sectional casin beingformed with a duct to drain the oi from said conduit.

In witness whereof, I hereunto subscribe my name, as attested by the two subscribing witnesses.

FRANCIS B. oooKBURN.

Witnesses:

` M. SMITH,

L. BECK. 

